Survivor: Game Changers — Mamanuca Islands is the 34th season of the American CBS competitive reality television series Survivor, featuring 20 returning castaways. The season premiered on March 8, 2017 with a 72 two-hour airing, marking the series' 500th episode, and ended on May 24, 2017, when Sarah Lacina was named the winner over Brad Culpepper and Troy "Troyzan" Robertson in a 7–3–0 vote.
This season was the third to film in Fiji after Survivor: Fiji and Survivor: Millennials vs. Gen X. It was the fourth season to feature entirely returning players, following Survivor: All-Stars, Survivor: Heroes vs. Villains, and Survivor: Cambodia and was the 11th season overall to feature returning players.
This season introduced several alterations to the game format. The process for resolving a tied vote was changed for this season, removing the second ballot where only non-tied castaways were allowed to vote between the tied castaways and proceeding directly to the procedure to resolve a deadlocked tie: an open deliberation between non-tied voters. The rest of the process remained the same (however, there turned out to be no tie votes in the season). The format of the Final Tribal Council, in which jurors individually addressed the finalists by delivering a statement or asking questions, was changed to a moderated discussion between the finalists and jurors.